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Re: [Qemu-discuss] [Qemu-devel] Qemu as a library?

From: Mikael
Subject: Re: [Qemu-discuss] [Qemu-devel] Qemu as a library?
Date: Tue, 10 Apr 2012 17:05:23 +0300

2012/4/10 Mikael <address@hidden>
Hi Jun -

That's the problem - none of this can be done whatsoever with libvirt.

The issue about libvirt is that it is a manager of virtualization programs running in separate OS processes. Doing the kind of tight interaction with several qemu instances in one userland process & thread, and full encapsulation of all the guests' IO into handlers in that app, would require Enormous amounts of IPC and OS context switching.

To the best of my knowledge, such an approach would mean an approx 1000% speed decrease in the qemu performance, compared to if it's used as a library as I queried for in the previous email.

Ah, that should have been 10 000% (100x).

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